Hi

this is rosana

I need your help as soon as you can

I need the explaination to proof of open mapping theorem( letT be a continuous linear operator on an F-spaceX onto an F-space Y. then T maps every open set of X onto an open set of Y ) in Functional analysis for kosaku yoside , I am so glad for doing that for me

I try to understand the proof from this book but i can not

or if you have any proof to this theorem in simplist way from any where, give it to me please